Bug; Powering off a display causes applications to crash and windows to resize. RRS feed

  • Question

  • This bug is still known to exist since windows 7 with all hardware configurations using HDMI and DP displays, so I'm bewildered as to why it has never been fixed. Furthermore since the latest updates windows will nolonger make use of the simulated display profiles in the registry, so explorer windows will be resized to fit only singular icons whenever the display is powered off regardless of the settings in the registry.
    Monday, December 7, 2015 12:33 PM

All replies

  • Open start and search for Feedback App and report these issues through Feedback App.
    Tuesday, December 8, 2015 6:14 PM
  • Open start and search for Feedback App and report these issues through Feedback App.

    There's already heaps of reports of it, but it also affects windows 8.1, 8, 7 and possibly even vista (not that the later matters).
    Wednesday, December 9, 2015 7:16 AM
  • Hi,

    This behavior occurs depending on the monitor and display card you use. Some DisplayPort monitors, when powered off, may de-assert their Hotplug Detect signal, indicating to the computer that the monitor may have been unplugged. In some cases, when Windows detects that all monitors have been unplugged, it will switch to a default display resolution. When this happens, any open windows and desktop icons may be moved or resized to fit within a virtual desktop. Which is also caused by loss of the HDMI handshake.

    One potential workaround for this problem is to use recommended resolution for monitor or avoid turning off the monitor manually via its power button. To conserve power, you can instead use the Power Options in the Windows control panel to set the monitor to be turned off automatically when the computer is not in use.

    In the other hand, some other users provide a hardware workaround, HDMI mini switcher/adapter between the PC and the TV might resolve the issue.

    Some sort of turning off “monitor detection” was provide by ATI or NVidia driver program, but since we don’t have them to test, we cannot confirm if it works.


    D. Wu

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    Monday, December 14, 2015 2:58 AM
  • The bug is where windows handles such an event, instead of maintaining the same resolution and display parameters it completely flushes it out to a "safe mode" setting and causes all sorts of problems.

    Common ones;
    - applications can crash due to suddenly loosing the ability to render at the current resolution,
    - windows will be "squashed" down like they were in a 800*600 display, worsened by any scaling setting,
    - scaling may end up corrupting windows or ceasing to function entirely,
    - lock screen may be shrunk below the size of the screen, meaning it will be smaller and with a large "border" that is the log-in screen in the background,

    Also, there's no way to disable this display behaviour, it's part of the DP standard.
    Monday, December 14, 2015 4:59 AM